MSM7540L Datasheet, PDF (1/15 Pages) OKI electronic componets – Single Rail ADPCM CODEC

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MSM7540L/7560L
Single Rail ADPCM CODEC
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Previous version: Nov. 1996
GENERAL DESCRIPTION
The MSM7540L/7560L are single channel ADPCM CODEC ICs which perform mutual transcoding
between an analog voice band signal 300 to 3400 Hz and 32 kbps ADPCM serial data.
Using advanced circuit technology, these devices operate from a single 3 V power supply and
provide low power consumption.
The MSM7540L/7560L are optimized for advanced digital cordless telephone system applications.
FEATURES
• Single 3 V Power Supply Operation
• ADPCM Algorithm :
Complies completely with 1988's version ITU-T
G.721 (32 kbps)
• Transmit/Receive Full-Duplex Operation
• Transmit/Receive Synchronous Mode Only
• Serial ADPCM Transmission Data Rate : 32 kbps to 2048 kbps
• Serial PCM Transmission Data Rate :
64 kbps to 2048 kbps
• PCM Interface Coding Format
MSM7540L :
A-law or Linear (14 bit, 2's compliment) Selectable
MSM7560L :
m-law or Linear (14 bit, 2's compliment) Selectable
• Low Power Consumption
Operating Mode :
Power-Down Mode :
• Two Analog Input Amplifier Stages :
18 mW Typ. (V_DD = 3.0 V)
0.3 mW Typ. (V_DD = 3.0 V)
Externally Adjustable Gain
• Analog Output Stage :
Push-pull Drive (direct drive of 350 W␣ + 120 nF)
• Built-in Crystal Oscillator (10.368 MHz)
• Built-in Reference Voltage Supply
• Option Reset Specified by ITU-T G. 721/ADPCM
• Package:
28-pin plastic SOP (SOP28-P-430-1.27-K) (Product name: MSM7540LGS-K)
(Product name: MSM7560LGS-K)
32-pin plastic TSOP (TSOPI32-P-814-0.50-1K) (Product name: MSM7560LTS-K)
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